_quadraticMesh = helper.IsQuadraticSubMesh(aShape);
helper.SetElementsOnShape( true );
const bool ignoreMediumNodes = _quadraticMesh;
-
+
// build viscous layers if required
TopoDS_Face F = TopoDS::Face( aShape/*.Oriented( TopAbs_FORWARD )*/);
if ( F.Orientation() != TopAbs_FORWARD &&
// Make input netgen mesh
// -------------------------
- NETGENPlugin_NetgenLibWrapper ngLib;
- netgen::Mesh * ngMesh = (netgen::Mesh*) ngLib._ngMesh;
+ // MESHCONST_ANALYSE step may lead to a failure, so we make an attempt
+ // w/o MESHCONST_ANALYSE at the second loop
+ int err = 1;
+ for ( int iLoop = 0; iLoop < 2; iLoop++ )
+ {
+ bool isMESHCONST_ANALYSE = false;
+ InitComputeError();
+
+ NETGENPlugin_NetgenLibWrapper ngLib;
+ netgen::Mesh * ngMesh = (netgen::Mesh*) ngLib._ngMesh;
+ ngLib._isComputeOk = false;
#ifndef NETGEN_V5
- char *optstr = 0;
+ char *optstr = 0;
#endif
- int startWith = MESHCONST_ANALYSE;
- int endWith = MESHCONST_ANALYSE;
- int err = 1;
+ int startWith = MESHCONST_ANALYSE;
+ int endWith = MESHCONST_ANALYSE;
- if ( !_hypLengthFromEdges && !_hypMaxElementArea )
- {
+ if ( !_hypLengthFromEdges && !_hypMaxElementArea && !iLoop == 1 )
+ {
+ isMESHCONST_ANALYSE = true;
#ifdef NETGEN_V5
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
#else
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
#endif
- ngLib._ngMesh = 0;
- ngLib.setMesh(( nglib::Ng_Mesh*) ngMesh );
- }
- else
- {
- Box<3> bb = occgeo.GetBoundingBox();
- bb.Increase (bb.Diam()/10);
- ngMesh->SetLocalH (bb.PMin(), bb.PMax(), netgen::mparam.grading);
- ngMesh->SetGlobalH (netgen::mparam.maxh);
- }
+ ngLib._ngMesh = 0;
+ ngLib.setMesh(( nglib::Ng_Mesh*) ngMesh );
+ }
+ else
+ {
+ Box<3> bb = occgeo.GetBoundingBox();
+ bb.Increase (bb.Diam()/10);
+ ngMesh->SetLocalH (bb.PMin(), bb.PMax(), netgen::mparam.grading);
+ ngMesh->SetGlobalH (netgen::mparam.maxh);
+ }
- vector< const SMDS_MeshNode* > nodeVec;
- problem = aMesher.AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
- if ( problem && !problem->IsOK() )
- return error( problem );
+ vector< const SMDS_MeshNode* > nodeVec;
+ problem = aMesher.AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
+ if ( problem && !problem->IsOK() )
+ return error( problem );
- // limit element size near existing segments
- TopTools_IndexedMapOfShape edgeMap, faceMap;
- TopExp::MapShapes( aMesh.GetShapeToMesh(), TopAbs_EDGE, edgeMap );
- for ( int iE = 1; iE <= edgeMap.Extent(); ++iE )
- {
- const TopoDS_Shape& edge = edgeMap( iE );
- if ( SMESH_Algo::isDegenerated( TopoDS::Edge( edge )) ||
- helper.IsSubShape( edge, aShape ))
- continue;
- SMESHDS_SubMesh* smDS = aMesh.GetMeshDS()->MeshElements( edge );
- if ( !smDS ) continue;
- SMDS_ElemIteratorPtr segIt = smDS->GetElements();
- while ( segIt->more() )
+ // limit element size near existing segments
+ TopTools_IndexedMapOfShape edgeMap, faceMap;
+ TopExp::MapShapes( aMesh.GetShapeToMesh(), TopAbs_EDGE, edgeMap );
+ for ( int iE = 1; iE <= edgeMap.Extent(); ++iE )
{
- const SMDS_MeshElement* seg = segIt->next();
- SMESH_TNodeXYZ n1 = seg->GetNode(0);
- SMESH_TNodeXYZ n2 = seg->GetNode(1);
- gp_XYZ p = 0.5 * ( n1 + n2 );
- netgen::Point3d pi(p.X(), p.Y(), p.Z());
- ngMesh->RestrictLocalH( pi, Max(( n1 - n2 ).Modulus(), netgen::mparam.minh ));
+ const TopoDS_Shape& edge = edgeMap( iE );
+ if ( SMESH_Algo::isDegenerated( TopoDS::Edge( edge )) ||
+ helper.IsSubShape( edge, aShape ))
+ continue;
+ SMESHDS_SubMesh* smDS = aMesh.GetMeshDS()->MeshElements( edge );
+ if ( !smDS ) continue;
+ SMDS_ElemIteratorPtr segIt = smDS->GetElements();
+ while ( segIt->more() )
+ {
+ const SMDS_MeshElement* seg = segIt->next();
+ SMESH_TNodeXYZ n1 = seg->GetNode(0);
+ SMESH_TNodeXYZ n2 = seg->GetNode(1);
+ gp_XYZ p = 0.5 * ( n1 + n2 );
+ netgen::Point3d pi(p.X(), p.Y(), p.Z());
+ ngMesh->RestrictLocalH( pi, Max(( n1 - n2 ).Modulus(), netgen::mparam.minh ));
+ }
}
- }
- // -------------------------
- // Generate surface mesh
- // -------------------------
+ // -------------------------
+ // Generate surface mesh
+ // -------------------------
- startWith = MESHCONST_MESHSURFACE;
- endWith = MESHCONST_OPTSURFACE;
+ startWith = MESHCONST_MESHSURFACE;
+ endWith = MESHCONST_OPTSURFACE;
- try {
- OCC_CATCH_SIGNALS;
+ try {
+ OCC_CATCH_SIGNALS;
#ifdef NETGEN_V5
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
#else
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
+ err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
#endif
- if(netgen::multithread.terminate)
- return false;
- if ( err )
- error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
- }
- catch (Standard_Failure& ex)
- {
- SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
- str << " at " << netgen::multithread.task
- << ": " << ex.DynamicType()->Name();
- if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
- str << ": " << ex.GetMessageString();
- error(str);
- }
- catch (...) {
- SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
- str << " at " << netgen::multithread.task;
- error(str);
- }
+ if(netgen::multithread.terminate)
+ return false;
+ if ( err )
+ error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
+ }
+ catch (Standard_Failure& ex)
+ {
+ SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
+ str << " at " << netgen::multithread.task
+ << ": " << ex.DynamicType()->Name();
+ if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
+ str << ": " << ex.GetMessageString();
+ error(str);
+ err = 1;
+ }
+ catch (...) {
+ SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
+ str << " at " << netgen::multithread.task;
+ error(str);
+ err = 1;
+ }
+ if ( err && isMESHCONST_ANALYSE )
+ continue;
- // ----------------------------------------------------
- // Fill the SMESHDS with the generated nodes and faces
- // ----------------------------------------------------
+ // ----------------------------------------------------
+ // Fill the SMESHDS with the generated nodes and faces
+ // ----------------------------------------------------
- int nbNodes = ngMesh->GetNP();
- int nbFaces = ngMesh->GetNSE();
+ int nbNodes = ngMesh->GetNP();
+ int nbFaces = ngMesh->GetNSE();
- int nbInputNodes = nodeVec.size()-1;
- nodeVec.resize( nbNodes+1, 0 );
+ int nbInputNodes = nodeVec.size()-1;
+ nodeVec.resize( nbNodes+1, 0 );
- // add nodes
- for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
- {
- const MeshPoint& ngPoint = ngMesh->Point( ngID );
- SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
- nodeVec[ ngID ] = node;
- }
+ // add nodes
+ for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
+ {
+ const MeshPoint& ngPoint = ngMesh->Point( ngID );
+ SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
+ nodeVec[ ngID ] = node;
+ }
- // create faces
- const bool reverse = false; //( aShape.Orientation() == TopAbs_REVERSED );
- int i,j;
- for ( i = 1; i <= nbFaces ; ++i )
- {
- const Element2d& elem = ngMesh->SurfaceElement(i);
- vector<const SMDS_MeshNode*> nodes( elem.GetNP() );
- for (j=1; j <= elem.GetNP(); ++j)
+ // create faces
+ const bool reverse = false; //( aShape.Orientation() == TopAbs_REVERSED );
+ int i,j;
+ for ( i = 1; i <= nbFaces ; ++i )
{
- int pind = elem.PNum(j);
- if ( pind < 1 )
- break;
- const SMDS_MeshNode* node = nodeVec[ pind ];
- if ( reverse )
- nodes[ nodes.size()-j ] = node;
- else
- nodes[ j-1 ] = node;
- if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ const Element2d& elem = ngMesh->SurfaceElement(i);
+ vector<const SMDS_MeshNode*> nodes( elem.GetNP() );
+ for (j=1; j <= elem.GetNP(); ++j)
{
- const PointGeomInfo& pgi = elem.GeomInfoPi(j);
- meshDS->SetNodeOnFace((SMDS_MeshNode*)node, faceID, pgi.u, pgi.v);
+ int pind = elem.PNum(j);
+ if ( pind < 1 )
+ break;
+ const SMDS_MeshNode* node = nodeVec[ pind ];
+ if ( reverse )
+ nodes[ nodes.size()-j ] = node;
+ else
+ nodes[ j-1 ] = node;
+ if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ {
+ const PointGeomInfo& pgi = elem.GeomInfoPi(j);
+ meshDS->SetNodeOnFace((SMDS_MeshNode*)node, faceID, pgi.u, pgi.v);
+ }
+ }
+ if ( j > elem.GetNP() )
+ {
+ SMDS_MeshFace* face = 0;
+ if ( elem.GetType() == TRIG )
+ face = helper.AddFace(nodes[0],nodes[1],nodes[2]);
+ else
+ face = helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
}
}
- if ( j > elem.GetNP() )
- {
- SMDS_MeshFace* face = 0;
- if ( elem.GetType() == TRIG )
- face = helper.AddFace(nodes[0],nodes[1],nodes[2]);
- else
- face = helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
- }
- }
- ngLib._isComputeOk = !err;
+ ngLib._isComputeOk = !err;
+ break;
+
+ } // two attempts
+
return !err;
}
